公开(公告)号：EP3854274A1

公开(公告)日：2021-07-28

申请号：EP19862126.0

申请日：2019-08-23

申请人： Make Tube S.r.l.

发明人： ZHAO, Feng

IPC分类号： A47J31/30

摘要： A coffee high yield foaming method and apparatus, the apparatus comprising a pressure control mechanism (2), a gas pressure source (11), a water storage device (3) and a back-pressure resonance mechanism (4), a lower part of the back-pressure resonance mechanism (4) being a coffee outlet (5). When a button (21) is pressed, water having a water pressure of 6-8 bar in a portable coffee machine or water having a water pressure of 9-11 bar in a household or tabletop machine enters into a coffee placement cavity (451) and dissolves and extracts coffee.
A resonant needle (42) and a colloid ring (43) constitute a resonance cavity (425); when a pressed coffee slurry traverses the resonance cavity (425), due to the special structure of the pressed coffee slurry and the resonance cavity (425), the coffee slurry undergoes high frequency oscillation, is then fully beat into a foam, and flows out of the coffee outlet (5). The apparatus structure occupies a small space and may be applied to large and small coffee machines of any model; meanwhile, coffee foam in the produced coffee may reach 70%.